At 24, Nathan Castillo of Morgan Hill's Castillo's Hillside Shire Winery is the youngest winemaker in the Santa Cruz Mountains, if not Northern California. Castillo, a certified sommelier who has been working alongside his parents since 2004, developed this wine tasting itinerary with friends and fellow sommeliers Rachel Voorhees and David Gruenloh in mind.

Jason-Stephens Winery: "He makes great reds and a chardonnay. His wines are true to varietal, and he got a double gold medal in the San Francisco Chronicle Wine Competition for his zinfandel."

Satori Cellars: "It's like a playhouse for adults. The tasting bar looks like a cantina. Everything at the winery is rainbow-colored. The park benches are neon green and orange, and they have a yellow brick road to the bathroom. Plus, the wine is good."

Java at Grinds Vines and Automobilia Club: This coffee house -- formerly known as the Hot Java Coffee Roasting Club -- in Morgan Hill is Castillo's favorite place to refuel. They serve lunch and pastries as well as coffee and espresso.